Q38

Question 38. Is It Possible To Change The Private Ip Addresses Of An Ec2 While It Is Running/stopped In A Vpc ?

Answer :

The primary private IP address cannot be changed. Secondary private addresses can be unassigned, assigned or moved between interfaces or instances at any point.

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Q31

Question 31. How You’re Charged In Amazon Ec2? Explain In Detail ? Answer : Charges varies upon AMIs backed and storage volums. AMIs backed by instance storage charged for: AMI storage + Instance usage AMIs backed by Amazon EBS storage charged for: Volume storage + Usage in addition to the AMI + instance usage When an Amazon EBS-backed instance is stopped, you are not charged for instance usage, but you are still charged for volume storage. AWS charges a full instance hour for every transition from a stopped state to a running state, even if we transition the instance multiple times within a single hour. For example:  if hourly instance charge for your instance is $0.10 and if you were to run that instance for one hour without stopping it, you would be charged $0.10. If you stopped and restarted that instance twice during that hour, then you would be charged $0.30 for that hour of usage (the initial $0.10, plus 2 x $0.10 for each restart).
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